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A cork resting on the surface of a pond bobs up and down two times per second on some ripples having a wavelength of 8.5cm. If the cork is 10.0m from shore, how long does it take a ripple passing the cork to reach the shore?
A comet moves about the Sun in an elliptical orbit, with its closest approach to the Sun being about 0.680 AU and its greatest distance from the sun being 38.5 AU (1 AU = the Earth–Sun distance).
a beam of protons is accelerated through a potential difference of 0.745kvand then enters a uniform magnetic field
A wrecking ball used to knock down buildings has a mass of m = 1250 kg and is suspended from a cable of length L =23 m. what is the highest mass the ball can have
Assume that a 90.0 W light bulb radiates all its energy as a single wavelength of visible light. Estimate the magnetic field strength at the surface of the bulb
a dog runs down a driveway with initial speed of 5 m/s for 8s, then uniformly increases his speed to 10 m/s in 5 s, determine How long is his driveway
Transverse waves travel with a speed of 18 m/s in a string under tension of 5 N. What tension is required for a wave speed of 27 m/s in the same string.
a wire 2.0mm in diameter and 4cmlong is connected to a 12v battery. if the resistivity of the wire is 3.5 x 10-5 ohm-m
The number of radioactive nuclei in a particular sample decreases to one-eighth of the original amount in 21 days. What is the half-life of the these nuclei
Where does the bare (5) come from, in the spring equation. I know where the .5 comes from (1/2), I know where the 1.2 comes from (Spring force), I know where the .05 comes from (5 CM, right?) -- so where does the 5 come from, and why isn't the .05 cm..
A diverging lens (f = -11 cm) islocated 21 cm to the left of a converging lens (f =34.0 cm). What is the height of the final image
The angle of incidence at a solid/liquid boundary is 86.2°, andthe index of refraction of the solid is n = 1.61.(a) What must be the index of refraction of theliquid such that the direction of the light entering the liquid isnot changed?
A jeweler working with a heated 43 gram gold ring must lower the ring's temperature t make it safe to handle. If the ring is initially at 94 degrees Celsius, what mass of water at 22 degrees Celsius is necessary to lower the ring's temperature to 38 ..
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